[thackney]

Anhydrous ammonia is classified by the Department of Transportation as nonflammable. However, ammonia vapor in high concentrations (16 to 25 percent by weight in air) will burn. It is unlikely that such concentrations will occur except in confined spaces or in the proximity of large spills.

http://svasd.com/images/1pm_Williams.pdf

Amm nitrate is also not very explosive

The people of Texas City will greatly disagree.

The Texas City Disaster
http://www.local1259iaff.org/disaster.html

[Pikachu_Dad]

Did you bother to read my post? Apparently not. Texas city explosion was caused when it was mixed with oil. Without the oil, it’s not an issue.